320628969 has 24 divisors (see below), whose sum is σ = 483243360. Its totient is φ = 210062160.

The previous prime is 320628967. The next prime is 320628977. The reversal of 320628969 is 969826023.

It is not a de Polignac number, because 320628969 - 2¹ = 320628967 is a prime.

It is a super-2 number, since 2×320628969² = 205605871524005922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320628967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 761379 + ... + 761799.

It is an arithmetic number, because the mean of its divisors is an integer number (20135140).

Almost surely, 2^320628969 is an apocalyptic number.

It is an amenable number.

320628969 is a deficient number, since it is larger than the sum of its proper divisors (162614391).

320628969 is an frugal number, since it uses more digits than its factorization.

320628969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 320628969 is about 17906.1154078711. The cubic root of 320628969 is about 684.4382194930.

The spelling of 320628969 in words is "three hundred twenty million, six hundred twenty-eight thousand, nine hundred sixty-nine".